Electrical Engineering

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Shiv Nadar University

Ramanujan Periodic Transform (RPT) is the newly emerging transform to identify periodicities in the given data. RPT represents the given finite length sequence into a weighted linear combination of signals from Ramanujan subspaces. RPT has the inability of handling the frequency components with in the Ramanujan subspace. This is due to the basis function (Ramanujan sum) used in RPT. To overcome this, a new mixed basis representation is proposed which uses both the sequences from Ramanujan subspace and complex exponentials as basis and both the basis are orthogonal to each other. Using this mixed basis representation, the problem of removing Power Line Interference (PLI) in ECG data is addressed. The methodology is tested on the MIT-BIH Arrhythmia database and the obtained results are competitive when compared with other techniques. © 2017 IEEE.

(SoE) School of Engineering

2017 4th International Conference on Signal Processing and Integrated Networks, SPIN 2017

Ramanujan and DFT mixed basis representation for removal of PLI in ECG signal

The electric field distribution (magnitude only) near a radiating source (antenna) can be easily determined using infrared thermography. A thin screen (made of carbon fiber reinforced polymers) is placed in front of a microwave source. The electromagnetic waves impinging on the screen are partially absorbed, resulting in temperature rise of the screen. This temperature rise is monitored by an infrared camera. The temperature distribution thus observed is mapped to the electric field strength (magnitude of electric field) of the electromagnetic waves. Points on the screen where the temperature rise is low correspond to weak electromagnetic fields whereas points with high temperature rise correspond to strong electromagnetic fields. In this paper electro-thermal modelling is done so as to obtain the temperature distribution over the screen, when an electromagnetic field is incident on it. This model can conversely be used for finding electromagnetic field distributions from IR thermal images. © 2017, Springer Science+Business Media, LLC.

World University root node

Journal of Nondestructive Evaluation

Modelling and Analysis of Power Distribution of Electromagnetic Waves on Plane Surfaces Using Lock-in IR Thermography

The paper presents a low cost method of actuation which is called lead-screw actuation for braille refreshable display. An array of six small sized independent motors are arranged in an array of 3×2 matrix. The shaft is coupled with a lead screw. Another internally threaded hexagonal nut is fitted on the lead screw which is constrained to move only in axial direction which actuates the pins. The device requires very low voltage and its operation is independent of temperature. The actuation of the pins can be achieved within 0.08 seconds as compared to 50 seconds in electrothermal braille refreshable display and 0.5 seconds in ionic polymer metal composite (IPMC) actuators. Moreover, no continuous power supply is required to retain the pins in the position once they have been actuated. © 2017 IEEE.

2017 4th IEEE Uttar Pradesh Section International Conference on Electrical, Computer and Electronics, UPCON 2017

Braille refreshable display using lead screw actuation

In this paper, we first make a theoretical and numerical analysis of electromagnetic (EM) vertex wave, which carries rotating phase (helical) front and orbital angular momentum (OAM). Subsequently 8 elements rectangular inset feed incrementally phased Circular Array (CA) Antenna is simulated which can generate Orbital Angular Momentum beam at 10 GHz. The simulated results verifies rotating phase with the result from the mathematical analysis. © 2016 IEEE.

Asia-Pacific Microwave Conference Proceedings, APMC

Generation of OAM mode using radially oriented Circular Array

Power conversion using multilevel convertes became very popular in past few years. They have the advantages of quality power output, high voltage compatibility, low electromagnetic compatibility concerns. © 2016 IEEE.

1st IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems, ICPEICES 2016

Phase shifted PWM cascaded multilevel inverter for solar PV grid integration

In this paper, we design a single transistor and zero-capacitor dynamic random access memory (DRAM or ZRAM) using band-gap engineered silicon-germanium (SiGe) Junctionless Double Gate Field Effect Transistor (JL-DGFET) device structure through 2D Sentaurus TCAD numerical simulations. We see that the inadequate charge storage capability of silicon-based 1T-DRAM is the main reason for short retention time. However, our simulations show that the performance can be further improved by replacing silicon substrate with silicon-germanium material. Moreover, a reduced breakdown voltage and hysteresis IDS-VDS characteristics are observed by putting SiGe as a bulk. Furthermore, the thickness of oxide and bulk material, and doping concentration are varied and their impacts are shown on the hysteresis output characteristic. High value of bipolar gain (β) is attained in designed band-gap engineered Si(1-x)Gex JL-DGFET transistors, which can be employed for enhancement of sensing margin in dynamic memories. © 2015 IEEE.

2015 6th International Conference on Computers and Devices for Communication, CODEC 2015

Design of band-gap engineered silicon-germanium Junctionless Double-gate FET for ZRAM application

The research article presents the design of five stage multistage telecommunication switching and FPGA synthesis. The cluster configuration of the designed network is 256 × 256 that supports maximum 3.436 × 10 10 calls simultaneously using 6,356,992 paths under the condition of full available network. Multistage switches are amenable to modular design and guarantees full available network. Modular design approach is used to build the large scale network, which can be fabricated easily using VLSI technology. The modular structure used to implement 256 × 256 five stage designs is 2 × 128 in first stage, 128 × 128 in second stage, 128 × 128 in third stage, 128 × 128 in fourth stage, and 128 × 2 in fifth stage. Moreover, the memory utilization has been found increased when number of nodes varied from 2 × 2 to 256 × 256 cluster size for the network. The design is developed with the help of Xilinx ISE 14.2 using VHDL, synthesized on Virtex-5 FPGA, and function simulation is carried out in Modelsim 10.1b student edition. The experimental set up ensures the successful transmission of data among inlets/outlets of the developed five stage network chip. © 2017, Springer Science+Business Media, LLC.

Wireless Personal Communications

Five Stage Telecommunication Switching Design and Synthesis

A novel beam-switching printed semicircular antenna design has been proposed to operate at the Terahertz (THz) frequency band. The distinctive feature of the design lies in the use of Graphene to control the radiation characteristics of the antenna. Further, we extend the same idea to explore the applicability of Graphene for isolation of electromagnetic energy with the help of a simple design of a microstrip transmission line with Graphene. The proposed antenna and microstrip line designs have been carried out with an objective of realizing voltage controlled antennas and transmission lines which have lot of potential in various emerging and next generation wireless communication systems such as phased arrays, MIMO systems, sensor networks, etc. © 2016 IEEE.

Design of novel beam-switching semicircular microstrip antenna and transmission line with Graphene at Terahertz frequencies

Model predictive control (MPC) is a model-based control philosophy in which the current control action is obtained by on-line optimization of objective function. MPC is, by now, considered to be a mature technology owing to the plethora of research and industrial process control applications. The model under consideration is either linear or piece-wise linear. However, turning to the nonlinear processes, the difficulties are in obtaining a good nonlinear model, and the excessive computational burden associated with the control optimization. Proposed framework, named as model-free predictive control (MFPC), takes care of both the issues of conventional MPC. Model-free reinforcement learning formulates predictive control problem with a control horizon of only length one, but takes a decision based on infinite horizon information. In order to facilitate generalization in continuous state and action spaces, fuzzy inference system is used as a function approximator in conjunction with Q-learning. Empirical study on a continuous stirred tank reactor shows that the MFPC reinforcement learning framework is efficient, and strongly robust. © 2016, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

Fulltext

IFAC-PapersOnLine

Model-free predictive control of nonlinear processes based on reinforcement learning

This paper presents a novel design of a rectangular microstrip patch antenna with two rectangular notches for operation at 5 GHz frequency. The proposed antenna has patch of 14 mm length and 28 mm width, it is designed and simulated on FR4 substrate of permittivity 4.1 and thickness 1.5 mm, for operating frequency of 5 GHz. The return loss is 28dB at 5 GHz. The antenna can be used for IEEE802.11a wireless local area network (WLAN) applications. © 2016 IEEE.